Interpretation ID: 3110yy
R.R. #1, Box 41A
Shirley, IL 61772
Dear Mrs. Funk:
This responds to your letter of July 5, l99l, as a followup to my letter of June 25. You have asked whether "it would be illegal for the owner of a vehicle that has a center highmounted stop lamp to install an additional rear window brake light? (anywhere in the back window?)"
The answer is that it would not be illegal under Federal law for a vehicle owner to install an additional stop lamp anywhere in the back window, providing that all modifications were performed by the owner. However, the legality of the modification would still be subject to State law.
You have also asked "What is F.M.V.S.S. 108?" That is Federal Motor Vehicle Safety Standard No. l08 Lamps, Reflective Devices and Associated Equipment. It can be found in Title 49 Code of Federal Regulations, as Section 571.108.
If you have further questions, please don't hesitate to write.
Sincerely,
Paul Jackson Rice Chief Counsel ref:l08#VSA d:7/30/9l